CVE-2026-55532: PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, MCP HTTP Stream _validate_origin uses request_origin.startswith(allowed), allowing the…

PriorityP344high7.6CVSS 3.1

AVNACLPRNUIRSUCLIHAL

EPSS

0.13%

2.8th percentile

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, MCP HTTP Stream _validate_origin uses request_origin.startswith(allowed), allowing the attacker-controlled localhost.attacker.com HTTP origin to satisfy the localhost allowlist. A webpage can send Content-Type: text/plain requests without preflight and invoke tools/call without an API key, including file writes that persist agent instructions. This issue is fixed in version 4.6.58.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
mervinpraison	praisonai	< 4.6.58	4.6.58
mervinpraison	praisonai	>= 0 < 4.6.58	4.6.58

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